PATHOMORPHOLOGICAL CHANGES IN FIRST-CALF HEIFERS IN CASE OF ASSOCIATIVE COURSE OF THE DISEASE CAUSED BY HEMOLYTIC STRAIN OF E. COLI AND BOVINE HERPES VIRUS 1
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Abstract
The associative course of the disease in heifers, caused by the hemolytic strain of E. coli and bovine herpes virus 1, is manifested by abortion and stillbirth. In all first-calf heifers, the retained placenta and necrotic metritis are recorded; 80.0% of the first-calf heifers die within a month after an abortion or a still-born fetus. At necropsy, the following pathoanatomical changes were detected, indicating a septic course of infection: necrotic metritis, hemorrhagic diathesis; right ventricular myocardial atrophy, acute alterative myocarditis; catarrhal-hemorrhagic cholecystitis; alterative hepatitis; fibrinous perihepatitis; acute catarrhal bronchopneumonia; hemorrhagic lymphadenitis; serous-fibrinous adhesive peritonitis; catarrhal-hemorrhagic enterocolitis; necrotic splenitis, fibrinous perisplenitis; hemorrhagic-necrotic nephritis.